Nodetool info

info - Provides detailed statistics for a specific node in the cluster, such as uptime, load, key cache hit rate, the total count of all exceptions, and more. If needed, you can specify which node to view by using the –host argument with the host IP address.

For example:

nodetool info

Example output:

ID                     : 2110829b-47f2-4a6b-b87e-a81bc3b5cb31
Gossip active          : true
Thrift active          : true
Native Transport active: true
Load                   : 294.44 MB
Generation No          : 1474434958
Uptime (seconds)       : 1868
Heap Memory (MB)       : 39.21 / 247.50
Off Heap Memory (MB)   : 7.74
Data Center            : us-east
Rack                   : 1b
Exceptions             : 0
Key Cache              : entries 0, size 0 bytes, capacity 0 MB, 0 hits, 0 requests, 0 recent hit rate, 0 save period in seconds
Row Cache              : entries 1064771, size 1.02 MB, capacity 450.8 MB, 96 hits, 120 requests, 0.800 recent hit rate, 0 save period in seconds
Counter Cache          : entries 0, size 0 bytes, capacity 0 bytes, 0 hits, 0 requests, 0.000 recent hit rate, 0 save period in seconds
Token                  : (invoke with -T/--tokens to see all 256 tokens)

Parameter

Description

ID

Node ID

Gossip active

Gossip status

Thrift active

Thrift status

Native Transp ort active

Native Transport status (CQL)

Load

How much hard drive space is used by SSTable (updates every 60 seconds)

Generation No

Generation No - When a major change occurs on a node, such as a restart or a changing tokens, the Generation number is increased

Uptime (secon ds)

Node Uptime since last restart

Heap Memory (MB)

Not applicabl e with Scylla

Off Heap Memory (MB)

Shows how much memory is used, by all tables, for Memtables , Bloom filters, Indexes, and Compressi on Metadata

Data Center

Which Data Center the node locate

Rack

The Rack that the node is located on

Except ions

Not applicabl e with Scylla

Key Cache

Not applicabl e with Scylla

Row Cache

Row Cache usage

Counte r Cache

Not applicabl e with Scylla

Token

List of the node tokens

Nodetool Reference